Bernard Dietrich

Anion receptor molecules : Synthesis of an octaaza-cryptand and structure of its fluoride cryptate

Abstract The octaaza macrobicyclic polyamine 1 has been synthesized and found to form a fluoride cryptate 9 whose crystal structure shows that the F − substrate is hexacoordinated to the 1 -6H + receptor molecule 8 in a quasi trigonal prismatic array of six F − ··· HN + hydrogen bonds.

Proton coupled membrane transport of anions mediated by cryptate carriers

Macrobicyclic diammonium salts mediate the selective membrane symport of bromide ions and protons via formation of anion cryptates.

CuII complexation by a tritopic macrocyclic ligand. A doubly µ3-hydroxo bridged trinuclear copper(II) cryptate

The tritopic hexa-aza-macrocycle (1) binds three CuII ions in solution and leads in particular to the assembly of a trinuclear bis-µ3-hydroxo bridged complex whose crystal structure has been determined; it may be considered as a cryptate of a cationic cluster [Cu3(OH)2]4+ held inside the macrocyclic cavity of the ligand.

Anion receptor molecules. Synthesis and some anion binding properties of macrocyclic guanidinium salts

A method for the introduction of guanidinium groups into macrocyclic molecules has been developed and applied to the synthesis of three such macrocycles (1), (3), and (5) which display enhanced binding of phosphate anion.

Cryptates: control over bivalent/monovalent cation selectivity

Macrobicyclic ligands are described which demonstrate how the alkaline-earth/alkali cation complexation selectivity may be controlled in designing synthetic ligands.